Editing nameserverips.yaml

I'm having a bit of bother setting up my nameservers and wanted to check if I've missed something obvious. I've been following tutorials from around the web and my /etc/nameserverips.yaml has been correctly set from my WHM Basic Setup, however my /var/cpanel/nameserverips.yaml was completely blank. I've populated the latter file following a tutorial but when I go into WHM to view the output, the result is not as I was expecting.